Gaston Bélier (1863 – 1938) was a French organist and composer,
a student of Eugène Gigout at the Conservatoire de Paris, he was titular organist at the Saint-Maclou of Pontoise Cathedral from 1892 to his death in 1938.
Bélier is mostly known today for his Toccata pour grand orgue in D minor published by M. Senart in Paris in 1912.